release-0.5

This release contains a number of internal cleanups, largely relating to improved error-handling.

The fuzzing support has been updated to use the native facilities available in go1.18+. As a result of updating the fuzzer numerous issues were detected and resolved. (Processing invalid bytecode was always expected to cause issues, but now there should be no outright crashes, instead the various methods will return errors appropriately.)

All the examples have been updated to use jmp rather than goto, and our internal trap setup has been fixed to define all possible traps as unimplemented explicitly.

The repository has had the workflows updated for both merge-request and push events, which should ensure that we don't break in the future.